75 lines
2.6 KiB
Java
Executable File
75 lines
2.6 KiB
Java
Executable File
package com.bytezone.diskbrowser.prodos;
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import java.awt.Dimension;
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import com.bytezone.diskbrowser.disk.AbstractSector;
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import com.bytezone.diskbrowser.disk.Disk;
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import com.bytezone.diskbrowser.disk.DiskAddress;
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// -----------------------------------------------------------------------------------//
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class ProdosBitMapSector extends AbstractSector
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// -----------------------------------------------------------------------------------//
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{
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private final ProdosDisk parent;
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// ---------------------------------------------------------------------------------//
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ProdosBitMapSector (ProdosDisk parent, Disk disk, byte[] buffer, DiskAddress da)
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// ---------------------------------------------------------------------------------//
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{
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super (disk, buffer, da);
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this.parent = parent;
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}
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// ---------------------------------------------------------------------------------//
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@Override
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public String createText ()
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// ---------------------------------------------------------------------------------//
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{
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Dimension grid = parent.getGridLayout ();
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// check range of bits for current block - so far I don't have a disk that needs
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// more than a single block
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int relativeBlock =
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diskAddress.getBlockNo () - parent.getVolumeDirectoryHeader ().bitMapBlock;
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int startBit = relativeBlock * 4096;
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// int endBit = startBit + 4096;
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if (startBit >= grid.width * grid.height)
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return "This sector is not used - the physical file size makes it unnecessary";
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int width = (grid.width - 1) / 8 + 1; // must be 1-4
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StringBuilder text = getHeader ("Volume Bit Map Block");
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if (false)
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{
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int block = 0;
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for (int row = 0; row < grid.height; row++)
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{
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int offset = block / 8;
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StringBuilder details = new StringBuilder ();
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for (int col = 0; col < grid.width; col++)
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details.append (parent.isSectorFree (block++) ? ". " : "X ");
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addText (text, buffer, offset, width, details.toString ());
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}
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}
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else
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{
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int startRow = relativeBlock * 512 / width;
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int endRow = startRow + (512 / width);
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int block = startBit;
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int byteNo = 0;
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// System.out.printf ("Start %d, end %d%n", startRow, endRow);
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for (int row = startRow; row < endRow; row++)
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{
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StringBuilder details = new StringBuilder ();
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for (int col = 0; col < grid.width; col++)
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details.append (parent.isSectorFree (block++) ? ". " : "X ");
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addText (text, buffer, byteNo, width, details.toString ());
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byteNo += width;
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}
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}
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text.deleteCharAt (text.length () - 1);
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return text.toString ();
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}
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} |